query_question:  An ideal gas is taken from state 1 to state 2 and then to state 3.  <image 1>If the process 1-2 is adiabatic and 2-3 is isothermal, what is a true statement about the change in temperature and heat transferred during 1-2?
options: [' $\\Delta $T > 0, Q > 0', ' $\\Delta $T < 0, Q = 0 ', ' $\\Delta $T = 0, Q = 0 ', ' $\\Delta $T > 0, Q < 0 ', ' $\\Delta $T = 0, Q < 0']
demo_question_list: The 3-arm lawn sprinkler of Fig. P3.114 receives 20°C water through the center at 2.7 m^3/hr. If collar friction is neglected, what is the steady rotation rate in rev/min for $\theta $ = 40°? <image 1>
  A. 317 rev/min
  B. 414 rev/min
  C. 400 rev/min
  
  Answer with the option's letter from the given choices directly. An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 175 kPa. Water is stirred by a paddle wheel while a current of 8 A flows for 45 min through a resistor placed in the water. If one-half of the liquid is evaporated during this constant-pressure process and the paddle-wheel work amounts to 400 kJ, determine the voltage of the source. Also, show the process on a P-v diagram with respect to saturation lines. <image 1>
  A. 204 V
  B. 224 V
  C. 244 V
  
  Answer with the option's letter from the given choices directly. The tank of liquid in the figure P2.139 accelerates to the right with the fluid in rigid-body motion. Compute a_x in m/s^2. <image 1>
  A. 1.00 m/s2
  B. 1.50 m/s2
  C. 1.28 m/s^2
  
  Answer with the option's letter from the given choices directly. An ideal gas taken round the cycle ABCA as shown in PV diagram<image 1>.The work done during the cycle
  A. PV
  B. PV/2
  C. 2PV
  D. PV/3
  
  Answer with the option's letter from the given choices directly.